Expert debunks nutrition myth between brown and white eggs

Eggs sold in supermarkets mostly come in brown or white shells. Many wonder: brown eggs and white eggs often have a slight price difference, but which is more nutritious? An expert clarifies that eggshell color has no relation to nutritional value; it depends on just one factor—the breed of the hen!

What's the difference between brown and white eggs? According to foreign media, registered dietitian Vicki Koenig explains that egg color is directly related to the chicken breed, and color is merely a genetic trait that doesn't affect internal nutrition. Specifically:

• Hens with pure white feathers lay white eggs.
• Hens with red or brown feathers lay brown eggs.

Why are brown eggs often more expensive?

Nutrition consultancy founder Emer Delaney clarifies that the price difference reflects rearing costs, not nutritional superiority. Common reasons include:

• Hens laying brown eggs are typically larger (often over 7 lbs), requiring more feed and energy, leading to higher production costs and prices.
• Hens laying white eggs are smaller, with lower rearing costs, making their eggs generally more affordable.

Nutritional Content is Identical

Koenig emphasizes that nutritionally, brown and white eggs are exactly the same.Regardless of color, each egg provides:

• Complete protein (~6g per egg)
• Vitamins A, D, E, K
• Choline (supports brain health)
• Antioxidants (e.g., lutein)
• Healthy fats

Dietitians note these nutrients offer benefits like boosting energy and satiety, helping regulate mood, maintaining muscle function, and reducing inflammation.

What Truly Affects Egg Nutrition? Feed & Farming Methods

The American Egg Board points out that the real factors influencing egg nutrition are not shell color, but these two key points:

1. Feed Composition:
   • Hens fed fortified/enriched feed can produce eggs with enhanced nutrient content.
   • Check labels for special fortifications like Omega-3 or Vitamin D.
2. Farming Methods:
   • A study in the journal Molecules found that organic eggs contained more nutrients important for infant/child growth, while conventional eggs contained more substances aiding fat metabolism.
   • Labels like "free-range," "pasture-raised," or "conventionally raised" primarily reflect the farming environment, not necessarily shell color or a direct, consistent nutritional advantage. The feed remains a major determinant.